[SCSI] stex: add small dma buffer support
[SCSI] stex: add small dma buffer support

The controllers of st_seq and st_vsc type can work
if only small dma buffer is available, with a reduced
firmware feature set. Add support for this case.

Signed-off-by: Ed Lin <c9dbd4ab75a2d1148413e552653a05e34df700fd@promise.com>
Signed-off-by: James Bottomley <407b36959ca09543ccda8f8e06721c791bc53435@suse.de>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas